Is this the real reason why Prince didn't have a will?

Los Angeles - Prince was too "paranoid" to make a will.

The Purple Rain hitmaker died at the age of 57 last week and didn't leave instructions as to how his assets should be divided, and insiders say that his advisors had found it "virtually impossible" to get him to sign any legal documents in the last five years.

Sources told TMZ the reclusive star felt "screwed over" by people who had made him sign various deals when he was younger, and as a result he was "paranoid" about putting his signature to any legally-binding paperwork.

Such was Prince's distrust, he changed lawyers almost every year, sometimes more often.

One professional who once worked with the singer received a call out of the blue from him to engage his services, prompting him to ask Prince for his business files.

The singer replied: "I don't know, they're out there somewhere."

The professional never received the documents.

Though the Diamonds and Pearls hitmaker frequently switched teams of business professionals, he did have a group of trusted advisers.

However, they are described as "beautiful, 20-something women, all models with no experience in anything".

On Tuesday Prince's sister Tyka Nelson filed legal documents stating her brother didn't leave a will.

She has requested to open a probate case and ask a judge to appoint a "special administrator" - someone who is appointed when there is no executor named in a will - to oversee her brother's affairs.

She stated in her documents: "I do not know of the existence of a will and have no reason to believe that the decedent executed testamentary documents in any form."

Tyka has requested Bremer Trust, National Association,  to serve as the official administrator because they provided financial services to Prince for several years.